Deadline reports that Sutter, whose FX series is now in its fifth season, took to Twitter on Friday (December 21) to blast AMC for letting Mazzara go.

He tweeted: "AMC is run by small-minded, bottom-line thinkers who have no appreciation or gratitude for the effort of its creative personal (sic)."

Sutter criticised AMC for its "disrespect" to writers and viewers, adding: "Mazzara took the work-in-progress that was Walking Dead and turned it into a viable TV show with a future. Without him, that future is dim."